Carburetor



Dec. 22, 1925- 1,566,382

INVENTOR ARTH UR DIONv BY ,Il

ATTO R N E Ys,

Patented Dec. l22, 192s.

UNITED STATES i 1,566,382 PATENT- oFFicE.

ARTHUR DIN, OF LEASIDE, ONTARIO, CANADA.

cnmauamon.

applicationinea April 25,1924. serial 110.709,014. i

. To all whom/t may concerl' Be it known that I, ARTHUR DION, a. subject of the King of' Great Britain, and a resident ofthe village of Leaside, in the 5 county of York, in the Province of Ontario,

Canada, have invented certain new and useful Improvements in Carburetors, of which the followin is the specification.

My inventlon relates to improvements in carburetors, andJ the object of' the invention is to devise a carburetor in which the consumption of. fuel will be ygreatly economized, in which thepriming of l the carburetor will be unnecessary, in which \the detrimental` results of backfire will be obviated, in which the feed `offuel from the carburetor to the, engine will be automatically effectedl by the operation of the engine, in which there will be no fuel leak- 'Y age, and in which the fuel supply may be positively controlled so as to produce the highest efficiency, and it' consists,v essentially of the arrangement and construction 'of parts hereafter more particularly explained.

Fig. 1 is a perspective view of my car- -buretor attached to an inletmanifold.

. Fig. 2 is a plan view of my carburetor showing the control lever in the low speed position, and in the high speed position in dotted lines.

Fig. 3i`s a sectional' view on line- 3--3 Figure 2.

Fig. 4,.: is a sectional view on line 4-4 Fi e2 .'.-V lig. 5 is an enlarged sectional view of .my fuel inlet valve. f.

' Fig. 6 is a rperspective detail of my fuel vfeed-control valve'. f l

Fig. 7 is a sectional detail of the control- 40 ling cam carried by the control lever for coacting with the control valve. I

Inthe drawings like characters of reference indicate corresponding parts in each figure.

to which my carburetor is attached.

3 is the bodyof my carburetor provided with aA tubular neck 4 extending outward therefrom, and attached, to' the end of the manifold neck 1.

7 is al1-,air inlet, the air n assing through .such inlet, through the bo y of the carburetor, and neck 4 to the manifold.

52 is a throttle valve for controlling the *.55 iiow of. air through, the neck v4.l

ularly to Figure 3.

.suction of the engine :such suction takin effect in the'cylin' er 32 1 "indicates the neck of an inlet manifold- 51 is a shaft upon which the throttle valve 52`is secured, and to which is also secured the throttlellever 50.

9 is an Aorifice formed in the top of the body 3. V

10 is a plug extending up through the lower portion of the body 3, and through' which extends'the fuel inlet 14 having a reduced portion 16 lea into a fuel chamber 15 as clearly indicate referring partic- 2 6 is a needle valve for controlling the `flow of fuel from the portion 16 of the inlet 14 to thefuel chamber 15. The valve 26 is held inv its closedposition by the spring 28 and is operated by mechanism actuated by piston suction of the engine, which mechanism I will now describe.

32 is a cylinder formed integraly with the carburetor body4 and havingclosed ends.

47 is a tube secured at one'end in the orifice 46 and extending at its opposite end through the lower end of the cylinder 32. The eect of the suction of the engine extends' into Vthe neck 4 through the tube 47 80 into the cylinderdi2.

38 is an u war spr` ressed iston slidable within the hylimllle 3,2. Whgn the piston Vtakes lace,

gg above describe draws down the piston 40 is a steink extending upward from the f piston 38 through the u per end of the cyl- 1nder'32, the upper en of the stem being provided with a slot 41.

42 is a lever' provided with a forked in'-, ner end 43. l

The needle'valve'26 lis reduced to form shoulders 30 with which the forked end of 95 the lever 42 engages, such shoulders bearing downward upon the vupper edges of the .members forming the fork.

31 are V-shaped groovesl formed in the carburetor body at each side of the orifice 9 and into which extend V-shaped projections 45 forming the fulcrum point-upon which the lever swings. The outer end of the lever 42 passes through the slotted opening 41 So that whenvthe piston 38 is drawndown by the engine suction the outer end of the lever 42 is also drawn downward and the forked end of such lever swings slightly upward so as to raise the needle valveV 26 sli htly y off its seat formed bythe upper end o the 110 inlet portion'16, thereby permitting the fuel to flow from the inlet into the. fuel chamber 15.

I will now describe the means by which the flow of fuel from the fuel chamber into the body of the carburetor is controlled.

17 is a small orifice extending through the wall of the fuel chamber 15.

18 is a sleeve valve provided with a perforation 19 which is adapted/to be carried into and out of the registering position with the orifice 17 by the vertical movement of the sleeve 18 upon the plug 10.

21 is a radial extension or lug carried by the sleeve 18 from which projects upwardly a pin 22. The pin 22 extends through an orlice 23. l

48 is a screw pin which is screwed in an orifice 48x in the carburetor body, the lower end of the pindextending down into proximity to the lug 21.

72 is a spiral spring which extends around I the plug 10 between the bottom of the carburetor body and the extension 21 tending to force the sleeve 18 upward and the extension into contact with the lower end'of the pin 48. When in this position the perforation 19 is in align withjthe orifice 17 permitting the flow of fuel therethrough, such fuel being drawn outward by the engine suction into the body of the carburetor to mix with the air and pass therewith ast the throttle valve 52 into the inlet mani old when such throttle is in the fully open position. In order to control the amount of fuel so fed in proportion to the extent to which the throttle valve is opened or closed. x

I provide the throttle lever 50 withV an extension' 54 having a -straight portion 55 extending when the throttle lever 50 is in the slow speed position to the ri ht hand'side of the pin 22 as will be clear y seen on lreferr" to Figure 2.

56 1s a cam 'shoe provided with an upwardl curved forward end, 57, the body o the shoe being inclined' downward as indicated at 58 from the upturned portion 57. The shoe 56 is carried by the straight portion of the throttle lever extension 54 above referred to by means of set screws 59, and 61, the screws 59 and 61 extending through orifices l 62 and 63 formed in the upper flange 64 of the cam' shoe 56, and into internally threaded orifices 65 and 66 formed in the extension 54 of the lever 50, and also by a set screw 60 extending through an orifice 67 and bearing at its lower end against theupper face of the extension 55- intermediately between the screws 59 and 61^. By this means the cam shoe 56 may be adjusted vertically as has v been before stated when the throttle lever in the open position that is in the position shown by c otted lines in Figure 2 the perforation 19 is in. registering alignment ManresaA carry the perforation of the sleeve 19 out of alignment with the orifice 17, and thereby gradually cut off the flow of fuel from the- (hfmber 15 to the interior of the carburetor As the throttle valve swings towards the slow s eed position, the extreme o en position o the throttle lever is limited y means of thev projections 68 depending therefrom and engaging the web 69 when the lever is in this position. When the lever is swung to the slow speed position, the movement is limited by means of the set .screw 70 carried by the lu 71 and engaging the opposite side of the Weth 69.

Having described the principal parts involved inmy invention, I will briefly described the operation of the same;

In starting, the throttle valve is in the full position shown in Figure 2. By the first suction stroke of the engine, air `is drawn through the carburetor from the air inlet 7. The needle valve 26 is raised by the drawing down of the piston 38 and stem 40 Swingin the operating end ofthe lever 42 downwar so that -its opposite end engages the shoulders 30 to raise the stem of the valve 36. The fuel is then drawn into the fuel chamber and through the orifice 17 and perforation 19 when in partial ali ent with such orifice into the mterioro the carburetor body so as to mix with the air drawn ast thethrottle valve into the inlet mani old. It will of course be understood that there is suiicient Y clearance between the throttle valve and wall of the neck 4 to permit the required amount of mixture to pass, necessary to start the engine. Y When it is desired to increase 'the d, the operating lever 50 is swung towar the dotted position shown in Figure 2, thereby carrying the inclined bottom'of the cam shoe 56 across the top ofthe pin 22, so as to permit such pin and the sleeve valve 18 to which it is connected to gradually rise and carry the perforation 19 towards thefully aligned position with the orifice-17.

When itis desired to decrease the speed of the engine, the operating lever is swung in the oppositedirection carrying the -inclined bottom 38 of the shoe 56 against the pin 22 so as to force it and' the sleeve valve 18 downward to 4carry the perforation 19 out of alignment with the orifice 17.

What I'claim as my invention is:

1. In a carburetor, the combination with the carburetor body having a'cylindrical fuel chamber located therein havi a fuel inlet leadi to the bottom thereo and a fuel outlet eading radially therefrom, and

. sleeve freely through lthe top lend of the pin to force it downward as the throttle lever is carried to the'closedposition.

2. In a carburetort the combination with .the carburetor body having a cylindrical fuel chamber located therein having a fuel inlet leading to the bottom thereof and a fuel outlet leading radially therefrom, and a throttlelever, of a sleeve valve slidably fitting the exterior of the 'fuel chamber and having a perforation adapted toI be carried intoand. out of alignment with the radial buretor body, a spring tending to force Athe orifice, a pin extending upward from the Vsleeve freely through the top ofthe carsleeve upward, a cam carried by the throttle lever having an inclined bottom adapted to engage the upper end of the sleeve valve pin to force it downward when the throttle lever is. swung towards the slow speed osition, and means for adjusting the cam s ticall on its support.

3. na carburetor, the combinationvwith` the carburetor body having a fuel inlet, a throttle valve and throttle lever, of a cylinder carried by the carburetor body, a tube extending between the carburetor at the suction side of the throttle valve andthe bottom of' the aforesaid cylinder, an upwardly sprin pressed piston operating within the cylin er, a stem extending from the iston freely through the top of the cylin er, a spring pressed needle valve stem coactin with the fuel inlet, and a lever fulcrume intermediately of itslength u on the carburetor body and engagilllleged e aa'zlfo'restidv e e v ve s m stem at one end and t at the opposite end. y

J DION.

oe very 

